3-D structure of the discharging zone of the Daginsky hydrothermal system (Sakhalin Island) according to the ground penetrating radar method and well logs

3rd National scientific conference with foreign participants "Geodynamical Processes and Natural Hazards"

生态环境科学

Yu Pavlova, B.^1 ; Zharkov, R.V.^2 ; Delemen, I.F.^3

Kamchatka Vitus Bering State University, Pogranichnaya Street 4, Petropavlovsk-Kamchatsky

683032, Russia^1

Institute of Marine Geology and Geophysics Far Eastern Branch of Russian Academy of Science, Nauki st. 1B, Yuzhno-Sakhalinsk

693022, Russia^2

Institute of Volcanology and Seismology, Far East Branch, Russian Academy of Sciences, Piip Avenue, 9, Petropavlovsk-Kamchatsky

683006, Russia^3

关键词: Comprehensive analysis;    Gamma activities;    Gamma ray loggings;    Ground Penetrating Radar;    Hydrothermal system;    Practical importance;    Self-polarization potentials;    Spatial structure;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/324/1/012026/pdf
DOI  :  10.1088/1755-1315/324/1/012026

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The paper presents the results of a comprehensive analysis of GPR data and geophysical well survey data (gamma-ray logging and self-polarization potentials) to study the 3-D spatial structure of the Daginsky hydrothermal system discharging zone (Sakhalin Island) and its hydrogeological situation. According to the GPR method, the paleo-valleys were identified, the morphology of which indicates the presence of runoff hollows, the accumulation of sandy-aleurite-clay sediments covered with peat formations. It can be concluded that the caprock in this area consists of a pack of water layers and permeable zones. Based on the data of geophysical studies in wells, three zones can be distinguished, each of which is characterized by the corresponding values of gamma activity and changes in the potentials of its own polarization. All this helps in identifying permeable thermally conductive zones. The data obtained are of practical importance.